#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char const **argv)
{
    char str[] = "hello world";
    char *p = str;
    *p = 'm';
    p++;
    *p = 'i';
    printf("%s\n", str);
    p = "mike jiang";
    printf("%s\n", p);

    char *q = "test";
    printf("%s\n", q);
    return 0;
}
